<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>

        *{
            margin: 0;
            padding: 0;
        }

        body
        {
            height: 100vh;
            margin: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            background-color: lightskyblue;
        }

        input {
            padding: 10px 5px;
            margin: 0 auto 10px auto;
            width: 200px;
            box-sizing: border-box;
            display: block;
            outline: none;
            border: 1px solid lightseagreen;
            border-radius: 5px;
            
        }

        
        input[type="button"]{
            background-color: lightseagreen;
            border: 1px solid lightseagreen;
            color: white;


        }

         input[type="button"]:hover{
            background-color: darkgreen;
            border: 1px solid darkgreen;
        }
         input[type="button"]:active{

            color: lightsteelblue;
        }

        main {

            width: 300px;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
            padding: 30px;

        }

        h1,h2,h3,h4{
            text-align: center;
            color: darkgreen;
            margin: 10px 0;
        }
    </style>
</head>

<body>



    <main>

        <h2>银河电脑</h2>

        <form>
            <div>

                <input type="text" name="name" placeholder="username" autocomplete="off">
            </div>

            <div>

                <input type="password" name="password" placeholder="password">
            </div>

            <div>
                <input type="button" value="登录">
            </div>


        </form>

    </main>





</body>

</html>